How far is the car from the base of the cliff when the car hits the ocean?


Posted August 30th, 2010 by admin 3 Comments »
car
ca.fa. asked:


A car is parked near a cliff overlooking the
ocean on an incline that makes an angle of
14◦ with the horizontal. The negligent driver
leaves the car in neutral, and the emergency
brakes are defective. The car rolls from rest
down the incline and has a velocity 10 m/s
when it reaches the edge of the cliff. The cliff
is 46.4 m above the ocean.
How far is the car from the base of the cliff
when the car hits the ocean?
It’s saying 29.6 is wrong.

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Posted in Physics | 3 Comments »

How much time is required for the entering car to catch up with the other car?


Posted July 17th, 2010 by admin 1 Comment »
car
Mariah asked:


A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.4 m/s2; after 3.8 s he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant velocity of 68.9 m/s overtakes and passes the entering car. The entering car maintains its acceleration. How much time is required for the entering car to catch up with the other car?

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Posted in Physics | 1 Comment »